Perspectives on issues related to studying adult psychology

Discuss your perspectives on issues related to studying adult psychology (for example, the nature/nurture issue or issues related to research methodology) and/or your perspectives on brain research, incorporating information from the videos you watched.
Some questions to consider for this discussion:
Was there anything from the videos that you found particularly interesting? If so, what, and why?
Was there anything that surprised you or that was different from what you previously thought to be true about the brain? If so, what, and why?
What are some advantages and limitations of different research methodologies in the study of adult psychology?
What is the significance of the nature/nurture (or heredity/environment) issue and the issue of continuous versus discrete development?
Why study adult psychology?